package org.jb.coinche.server.user.impl;

import java.util.HashMap;
import java.util.Map;

import org.jb.coinche.client.user.LoginException;
import org.jb.coinche.server.user.UserRegistry;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.inject.Singleton;

@Singleton
public class UserRegistryImpl implements UserRegistry {

	private final static Logger logger = LoggerFactory.getLogger(UserRegistryImpl.class);

	
	private final Map< String, String > users = new HashMap< String, String >();

	/*
	 * (non-Javadoc)
	 * @see org.jb.coinche.server.user.UserRegistry#checkLogin(java.lang.String, java.lang.String)
	 */
	@Override
	public synchronized void checkLogin(String name, String password) throws LoginException {
		
		logger.debug("Checking login {}...", name );
		
		if (password == null)
			password = "";
		
		String savedPassword = users.get( name );
		
		if (savedPassword == null) {
			users.put( name, password );
		} else {
			
			if (!savedPassword.equals( password ))
				throw new LoginException();
		}
	}

	/*
	 * (non-Javadoc)
	 * @see org.jb.coinche.server.user.UserRegistry#getUsers()
	 */
	@Override
	public synchronized String[] getUsers() {
		return users.keySet().toArray( new String[0] );
	}

	/*
	 * (non-Javadoc)
	 * @see org.jb.coinche.server.user.UserRegistry#notifyActivity(java.lang.String)
	 */
	@Override
	public void removeLogin( String user ) {
		users.remove(user);
	}
}
